Pictures of the day: 12 February 2013

It's a little known fact, but a family has been on the moon for 40 years. Apollo 16 astronaut Charles Duke didn't just leave footprints when he visited the lunar surface, he left a photograph of his family on 23 April 1972. The Lunar Module pilot left a plastic-wrapped portrait of him and his wife and their two sons, Thomas and Charles, sitting on a bench. Duke photographed the personal snap with a Hasselblad camera as it rested on the dusty surface next to one of his boot prints.Picture: NASA/Rex Features